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local TweenService = game:GetService("TweenService")
local spikesFolder = workspace:WaitForChild("Spikes") -- your folder
local distance = 10   -- how far spikes move
local speed = 2       -- movement speed
local damage = 20     -- damage given to player

-- Function to set up each spike
local function setupSpike(spike)
	-- Save starting position
	local startPos = spike.Position

	-- Damage players on touch
	spike.Touched:Connect(function(otherPart)
		local character = otherPart.Parent
		local humanoid = character:FindFirstChild("Humanoid")
		if humanoid then
			humanoid:TakeDamage(damage)
		end
	end)

	-- Run the movement in a new thread
	task.spawn(function()
		while true do
			-- Move right
			local rightGoal = { Position = startPos + Vector3.new(distance, 0, 0) }
			local tweenRight = TweenService:Create(spike, TweenInfo.new(speed, Enum.EasingStyle.Linear, 
				Enum.EasingDirection.InOut), rightGoal)
			tweenRight:Play()
			tweenRight.Completed:Wait()

			-- Move left
			local leftGoal = { Position = startPos }
			local tweenLeft = TweenService:Create(spike, TweenInfo.new(speed, Enum.EasingStyle.Linear, 
				Enum.EasingDirection.InOut), leftGoal)
			tweenLeft:Play()
			tweenLeft.Completed:Wait()
		end
	end)
end

-- Loop through all spikes in the folder
for _, spike in ipairs(spikesFolder:GetChildren()) do
	if spike:IsA("BasePart") then
		setupSpike(spike)
	end
end